US2670975A

US2670975A - Articulation joint

Info

Publication number: US2670975A
Application number: US131372A
Authority: US
Inventors: Schwabe Kurt
Original assignee: Individual
Current assignee: Individual
Priority date: 1949-12-06
Filing date: 1949-12-06
Publication date: 1954-03-02
Anticipated expiration: 1971-03-02

Description

March 2, 1954 K. scHwABE ARTICULATION JOINT 2 Sheets-Sheet 1 Filed Dec. 6, 1949 March 2; 1954 K. scHwABE 2,670,975

ARTICULTION JOINT Filed Dec. 6, 1949 2 Sheets-Sheet 2A Patented Mar. 2, 1954 Ultirltn STATES PATENT 1 oiFfFier-z AmrmUriATIoN. JoIN'rL Y Kurtf;scnwaheLe Loelaswitzerlana. Application December s, 1949,. seriaiNo. 'relata soiaims.. (C1. 287-87),

I, The invention relates; toy anv artiillationjoint forthe connection of two. components suQh. as the. connectionA of the shafts of a loom to, their driving members or ofthe-latter between, them.- selves. It is. a. main` object o the invention. to; pro.- vide an articulation joint which. combines the advantages. of. a ball joint, with. the; possibility of easier assembling. and. dismantling". than; has been possible hitherto .with ball joints,

It is another object of the. invention. topro,- Vide an articulation. joint.. wherein the. use. of screws, wedges, splintsorvother connecting. elements. is dispensed with.

It is a further objectofftheinventiontoprof vide. av linkage incorporatingarticulation joints which can be assembled and dismantledwithout any tools simply. by turning oneof. twoassociated components of the linkage about. its :longitudinal axis approximately a. quarterturn from itsV op.- erative position.

Further objects of the. invention will appear from the description of some embodimentsfand applications of` theinvention later. in: .this1specifcation.

Accordingv toa main featurev of# the invention the articulation joint'` comprises-.inv combination: a spherical.. zone member arranged'.` for: being at.-V .tachecl` to the end of. one of# the said compo.-

.nentsi ai recessedV bearingv portionarrangedonithe other one ofthe said components; laterally: open on. bothr sides and having a; mouth; in-itsvcire cumference of' a1 width larger than the: thickness of.' the said spherical.- zoneY member.- butsmaIIer than.. the diameters oathe, ends faces thereof.; thesaid.. spherical zone:V member:- being; adapted toibe inserted into and-Withdrawn.from thesaid bearing portion throughu the said.A mouthing a position transversefto. the said bearing portion, and to be articulated insaid bearing. portionin apositi'on4V wherein the. axes .of thesad bearing portion and` spherical zone..v member.. substan: tially coincide.v

In order that the inventonmay be better un.- derstood and readily, carried" into eect an em,- bodiment and two modifications thereof" aswell as an application thereof` will beh now' described by Way of` example with reference toethe accomlpanyingv drawing. And while I; describe` and -illustrate useful embodiments and` applications of my. inventionV Il Wish it ztoibe. understood that'LI do not, limit.. myself tothe.; detailsffandfdimene sions. as; shown,V for obvious.l modifications .will `oecurto those.sl i11 edinz.the;'artiv Instlxefaccomf RiDXgIlgdY/BSLL 1 Eigf.. L. shows.` af laterali elevationl of' an articula-.- tionejoint, v

Eiga. 2. and 3; show. thetwo partsof this. articulation joint.` such a relative position. that they; canbe.- assembled andi. disengaged, one part being;- shown. in section. in lilig 2VA aand the other Dartinzllig.,3v

Figs. 4; and 5jxshow; twc .modied embodiments oi this articula-tionfjcintin sect-icm.A f

Eig. Gpshowsa shaftofv arloom andthe drivingimembersrthereofjinelevationiand Fig. 'l is aplan View' of:A the: shaft: mechanism of this'loom with-.the shafts omittedi;

At; the, end'vl; of the.- onefoi-:thatwo' components to, be connected. with.. one another by the ar'- ticulation,I joint, v sheet: metak fittings 3: aree attachedparallel to one-another bylmeanso'i rivets 2;, each saiditting, having.;- a round-i discx on` a stem; 41. whichv projects. beyondl the; end If of said component. Betweenzthesefdiscs' 5 a spherical zone memberLi; e..af body in the-shapeofY a perforated. spherical..zone hav-ingenti faces of equal;A diameter;l is attached by; means. elia rivet 6; The'diameter of the-endfacesfofthevspherical zone; memberfl is largerf. thanf the diameter of the discsi;

Qn the; other. component 85017: the..tWo-- compo.- nentsato.,Y be connected byf means ofi the. articula-.- tionjoint; afbearing aperture 9,r open at both sides; ispro'vided.y which., has.n an.. open mouth` I0 the width of which' is smallerwthan the diameter of: the discs -.butilargerf than .'theeheight ofthe spherical zone'v member.l l including the sheet metal. thickness of the two discs. 5. The part` 8 has on=eachsidefacircular ledge-'II extending around thev bearing'algierti-ir-.ef9. In the bearing aperture 9 an open., resilient,A inserty l2. is infserted which. has at` its':ends,projeetions. t3 i bear-- ing. on'the-edges' of the'mouth-lu, andwhich has on4 each sidethreezradialceutward projecting lugs Milly-ing ontheledgestl i-, infsuchfamanner that the inserta. l2.A sitting inf. the: bearnggaperture. 9 es. .oathaacqrnnoncatf 8i: .lll-heile- @mensuel with the spherical zone member 'I is subsequently turned about its longitudinal axis through an angle of 90 into the position represented in Fig. l, the spherical zone surface of the spherical member I comes to lie within the spherical inner surface of the insert I2. Since the spherical zone member 'I now lies within the spherical inner surface of the insert I2 it can not emerge laterally therefrom. In this manner a ball-joint like connection between the two components to be connected with one another is effected, which is capable of being disengaged by turning the two components relatively to one another about the longitudinal axis of the component I to such an extent that the discs 5 with the spherical zone member 'I stand transversely to the mouth I of the bearing aperturegof the component 8, and can be withdrawn through the latter.

In the modiiied embodiment according to Fig. 4 the insert I2 has been replaced by two partly annular guide members I5 of round cross section, which lie in grooves machined into the component 8 and are contacted by the spherical zone member 1. In the modiiied embodiment according to Fig. 5 even these guide members I5 are dispensed with, and the inner surface of the bearing aperture 9 is made spherical instead.

In Figs. 6 and 7 the principal application of the articulation joint according to the invention is illustrated, viz. the connection of the shafts of a loom with their driving members and of the latter between themselves. Only one connection is shown in Figs. 6 and "I by way of example. The shaft frames are denoted a., which frames are housed shiftably up-and-down in a guide not shown in the drawing and which rest each on two driving rods b and b the upper ends of which are articulated to the shaft frame a. The lower ends of these driving rods b and b are each articulated to one arm of two bell crank levers c, c', respectively, the other arms of which are coupled with one another by means of a connecting rod d. The bell crank levers c and c' are rotatably and shiftably arranged on axles e, e', respectively, which are journalled in the frame of the loom not shown in the drawing. At the end of that arm of the bell crank lever c to which the connecting rod d is articulated, the end of a connecting rod f is articulated, the other end of which is articulated to the end of a treadle g. On the treadle g a lifting wire h is tiltably arranged having the hook ends k and lc' which cooperate with the draw knives i and i. All articulations between the shaft frame a and the driving rods b and b', between the latter and the bell crank levers c and c', between the bell crank levers c and c and the connecting rods d, between the bell crank level' c and the connecting rod f, and between the latter and the treadle g consist of articulation joints according to the invention. In Fig. 6 the bell crank levers c and c' and the connecting rod d of the foremost and rearmost shafts only are shown. On the axles e and e adjustment collars l and l' are provided which can be clamped fast by means of clamping screws m, m' respectively, whereby the bell crank levers c and c are held together in the axial direction on their axles e and e. The driving rods b and b', and the connecting rods d and f have fiat cross sections and are operatively connected so that they can not be turned about their longitudinal axes when the bell crank levers c and c' are restrained by the adjustment collars I and l against beingaxially shifted.. Disengagement of the articulation joints is thereby made impossible. For the assembly and dismantling, the clamping screws m and m of the adjustment collars l and Z' as well as the holding members not shown in the drawing are to be loosened, whereupon the shaft frames a. and their driving members can be pushed apart in such a manner that a gap is formed of a width sufficient for assembling or separating the components of the articulation joints.

What I claim as my invention and desire to secure by Letters Patent is:

l. An articulated joint, comprising, in combi nation, a rst flat joint member having lateral faces and a relatively narrow peripheral edge face between the same, said rst joint member being formed with a circular bearing hole having a circular inner bearing face and with a passage connecting said hole with said edge face; and a second flat joint member including a circular disc-shaped portion provided with a peripheral face having the shape of a spherical zone and with two lateral faces extending transversely to the axis of said disc-shaped portion, and further including a relatively narrow radially extending connecting portion securing said disc-shaped portion to the remainder of said second joint member, said peripheral spherical bearing face of said disc-shaped portion slidably engaging said inner bearing face of said first joint member with said lateral faces arranged in substantially parallel planes and with the axes of said disc-shaped portion and of said circular inner bearing face coinciding for relative turning of said first and second joint members about said axis of said disc-shaped joint portion, the distance between said lateral faces of said second joint member being lesser than the width of said passage so as to permit detaching and mounting of Said disc-shaped portion through said passage in a position turned for an angle of about another axis extending normal to said first axis and through said passage.

2. An articulated joint, comprising, in combination, a first flat joint member having lateral faces and a relatively narrow peripheral edge face between the same, said first joint member being formed with a circular bearing hole having a circular inner bearing face forming part of a spherical surface having the center thereof in the center of said bearing hole and with a passage connecting said hole with said edge face; and a second ilat joint member including a circular disc-shaped portion provided with a peripheral face having the shape of a spherical zone and with two lateral faces extending transversely to the axis of said disc-shaped portion, and further including a relatively narrow radially extending connecting portion securing said discshaped portion to the remainder of said second joint member, said peripheral spherical bearing face of said disc-shaped portion slidably engaging said inner bearing face of said rst joint member with said lateral faces arranged in substantially parallel planes and with the axes of said disc-shaped portion and of said circular inner bearing face coinciding for relative turning of said first and second joint members about said axis of said disc-shaped joint portion, the distance between said lateral faces of said second joint member being lesser than the width of said passage so as to permit detaching and mounting of said disc-shaped portion through said passage in a position turned for an angle of 90 about another axis extending normal to said rst axis and through said passage.

3. An articulated joint, comprising, in combination, a first iiat joint member having lateral faces and a relatively narrow peripheral edge face between the same, said first joint member being formed with a circular bearing hole and with a passage connecting said hole with said edge face; a resilient bearing member having two projecting end portions and a part-annular portion connecting said projecting end portions, said resilient bearing member being located in said bearing hole with said projecting end portions projecting through said passage, said annular portion being formed with an inner bearing face forming part of a sphere having the center thereof in the center of said bearing hole, said resilient bearing member being provided with radially7 extending lugs secured to said annular portion and engaging said lateral faces of said first joint member; and a second iiat joint member including a circular disc-shaped portion provided with a peripheral face having the shape of a spherical zone and with two lateral faces extending transversely to the axis of said disc-shaped portion, and further including a relatively narrow radially extending connecting portion securing said disc-shaped portion to the remainder of said second joint member, said peripheral spherical bearing face of said disc-shaped portion slidably Y engaging said inner bearing face of said resilient bearing member with said lateral faces arranged in substantially parallel planes and with the centers of said peripheral spherical face oi said discshaped portion and the center of said spherical inner bearing face of said resilient bearing member coinciding for relative turning of said first and second joint members about said axis of said disc-shaped joint portion, the distance between said lateral faces of said second joint member being lesser than the distance between said projecting end portions of said resilient bearing member so as to permit detaching and mounting of said disc-shaped portion through said passage in a position turned for an angle of 90 about another axis extending normal to said first axis and through said passage.

4. An articulated joint, comprising, in combination, a iirst fiat joint member having lateral faces and a relatively narrow peripheral edge face between the same, said first joint member being formed with a circular bearing hole having a cylindrical inner bearing face and with a passage connecting said hole with said edge face; a second iiat joint member including a circular discshaped portion provided with a peripheral face having the shape of a spherical zone and with two lateral faces extending transversely to the axis of said disc-shaped portion, and further including a relatively narrow radially extending connecting portion securing said disc-shaped portion to the remainder of said second joint mem- 1oer, said peripheral spherical bearing face of said disc-shaped portion slidably engaging said inner bearing face of said iirst joint member with said lateral faces arranged in substantially parallel planes and with the axes of said disc-shaped portion and of said circular inner bearing face coinciding for relative turning of said first and second joint members about said axis of said discshaped joint portion, the distance between said lateral faces of said second joint member being lesser than the width of said passage so as to ermit detaching and mounting of said discshaped portion 'through said passage in a position turned for an angle of about another axis extending normal to said rst axis and through said passage; and two annular members secured to said rst joint member and located in said bearing hole spaced from each other and slidably engaging said spherical peripheral face of said disc-shaped portion adjacent to said lateral faces of the same. i

5. An articulated joint according to claim 1 wherein said radially extending connecting portion includes a pair of sheet metal plates, each sheet metal plate including a circular portion secured to one lateral face of said disc-shaped portion, and a narrow neck portion connecting said circular portion with the remainder of said second joint member.

6. An articulated joint according to claim 3 wherein said radially extending connecting portion includes a pair of sheet metal plates, each sheet metal plate including a circular portion secured to one lateral face of said disc-shaped portion, and a narrow neck portion connecting said circular portion with the remainder of said second joint member.

KURT SCHWABE.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 543,615 Dibrell July 30, 1895 849,384 Gault Apr. 9, 1907 1,496,466 Jackson June 3, 1924 2,309,281 Steele Jan. 26, 1943 FOREIGN PATENTS Number Country Date 331,733 Germany Jan. 14, 1921 497,956 Germany May 17, 1930 '785,433 France May 20, 1935 870,636 France Mar. 18, 1942